Malicious PDF — malware analysis report

Static analysis result for SHA-256 712db5b1c1084cde…

MALICIOUS

PDF

811.9 KB Created: 2010-08-16 21:58:00 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))
MD5: 1d4ef185718aeff32802ec9b853b2b81 SHA-1: f114800a2222e33b6a2490504bbe89baae76474b SHA-256: 712db5b1c1084cde9232d62083251886de0247379cb2c14d9a5e25e1a33f5521
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a hidden iframe pointing to an external URL, indicating an attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of an embedded URL and the nature of the heuristics point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 3

  • ClamAV: Html.Spyware.IMG-7 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Html.Spyware.IMG-7
  • PDF contains hidden external HTML iframe high PDF_HIDDEN_HTML_IFRAME
    PDF bytes contain a hidden zero-size HTML iframe pointing to an external HTTP(S) URL. This is a strong malicious dropper/redirect indicator and is not expected in ordinary PDF content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.codeforum.cn/free/max1.htm
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ba7c.bin
a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBA7C 264072 bytes

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